Create wrappers for MacOS/Linux to allow sdk "binaries" to be

sdk/bin/dartdoc

+#!/bin/bash
+# Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+# Setting CUR_DIR this way is ugly, but is needed to handle the case where
+# dart-sdk/bin has been symlinked to. On MacOS, readlink doesn't work
+# with this case.
+CUR_DIR="$(cd "${0%/*}" ; pwd -P)"
+if [ -z "$DART_VERSION" ];
+then
+  DART_VERSION="ReleaseIA32"
+fi
+
+if [[ `uname` -eq 'Darwin' ]]; 
+then
+  BIN_DIR="$CUR_DIR"/../../xcodebuild/$DART_VERSION
+else
+  BIN_DIR="$CUR_DIR"/../../out/$DART_VERSION
+fi 
+
+unset COLORS
+if test -t 1; then
+  # Stdout is a terminal.
+  if test 8 -le `tput colors`; then
+    # Stdout has at least 8 colors, so enable colors.
+    COLORS="--enable-diagnostic-colors"
+  fi
+fi
+
+exec "$BIN_DIR"/dart --no_use_inlining --heap_growth_rate=32 "$CUR_DIR/../lib/_internal/dartdoc/bin/dartdoc.dart" $COLORS "$@"